Stone-cutting machine



(No Model.)

W. BIRSS.

. STONE CUTTING MACHINE.

No. 252,172. Patented Jan. 10,1882

I'y. J.

lllli-nlll k .ttorneys EIERS PhalmLithogruphar, Wash-raglan. o. c.

UNITED STATES PATENT OFFICE.

WILLIAM BIRSS, OF LONG COVE, TENANTS HARBOR, MAINE.

STONE-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 252,172, dated January 10, 1882.

Application filed July 22, 1881. (N0 model.)

To all whom it may concern Be it known that I, WILLIAM BIRSS, of Long Cove, Tenants Harbor, in the county of Knox and State of Maine, have invented certain new and useful Improvements in Stone- Outting Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which-- Figure 1 is a plan view of my improved stone-cutting machine. Fig. 2 is a side view, partly broken away, showingthe lathe orcut ter operating screw; and Fig. 3 is a detail plan view, on an enlarged scale, of the topof the sliding and adjustable carriage which carries the rotary cutter.

This invention relates to improvements in stone-cutting machines, particularly for outting round or cylindrical stone-surfaces; and it consists in certain details of construction and operation of parts, substantially as hereinafter more fully set forth and claimed.

Referring to the accompanying drawings,A is abed-frame, preferably supported upon legs (ta. Journaled in bearings 11 b, fastened at one end of the frame A, is a shaft, 0, having a driving-pulley, c, bet-ween said bearings, a second pulley, d, at its outer end, and a disk or plate, c, at its inner end, having facial pins or studs 6, which fit into cavities in the end of the stone to be operated upon and assist to hold it. At the opposite end of the frame A is a sliding block,f, haviug feet adapted to fit into and slide in grooves in that end of the frame which is provided with a hand-crank screw, g, adapted to bear in a cavity in that end of the stone or block of granite to effect the holding thereof. This block, it will therefore be seen, can be moved up to and away from the stone or block, as may bedesired, in

adjusting it in position to be cut and remov ing it after the completion of the cutting'operation.

B is a carriage, which isadapted to travel by means of and upon the screw-rod O, extend: in g theentire length of the frame and parallel with the line or plane of cutting the stone. It is driven by a pulley, h, at one end and a belt encompassing the latter and the pulley (1 upon the shaft 0. The upper part of this carriage, B, is capable of having a'motion toward and from the work or at right angles to the plane of cutting the stone, to permit of the adjustment of the tool or cutter, accordingly as oocasion may require. To effect this adjustment, a hand-screw, i, engaging a female screwthreaded eye or tube in the under side of the slide B of the carriage B, is employed.

It will be observed that the top'part, B, of the carriage Bis of circular shape and provided with two segmental slots,jj, through which project studs or guide-pinsj j", affixed in the. carriage-block B, upon which the circular top is pivoted by acentral pintle, a. -To relieve the latter from strain the under side of the top part, B, has a central dovetailed recess, 0, of circular shape, which fits upon aprojecting stud or button, 1), of corresponding shape, forming part of the carriage B, thus permitting of ready rotary adjustment of the top part, while at the same time relieving the central pintle, n, from strain, and also preventing the top from coming off of the bottom part,.B.

The shaft i has a small pinion, Z, covered by a box or casing, l, which engages with a cogged section, m, upon the top of B for effecting the rotary adjustment of said part with its cutter k. i

It will be observed that this machine is adapted to cut cylindrical or round surfaces upon stone or blocks of granite, such as columns, vases, urns, 850.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- In a machine for cutting or dressing stone, the combination of the sliding carriage B, having central dovetailed button, 1), and guidestuds jj on opposite sides of said button, pintle n, and circular top part, B, having segmental slots jj,.and central circular dovetailed recess, 0, as shown and described, for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

. WILLIAM BIRSS.

Witnesses:

Joan E. Lone,

HENRY F. KELLooH. 

